Skip to Content

Clunk Over Bumps? Here’s What’s Loose

Hit a pothole, speed bump, or driveway lip and hear a clunk? That’s your suspension yelling, “I’m loose down here!”

Why It Happens

Suspension parts are built to flex and cushion, but when bushings, joints, or struts wear out, they leave metal to knock metal. Every bump = a clunk. It’s not just annoying — it means parts are moving that shouldn’t, and the longer you wait, the sloppier (and more expensive) it gets.

Most Common Causes

  • Worn sway bar links or bushings – cheap, common clunk-makers.
  • Ball joints or control arm bushings – the heavy hitters of suspension noise.
  • Struts or shocks shot – internal play or broken mounts.
  • Loose exhaust or underbody hardware – sometimes it’s not suspension at all.

What You Can Check

  1. Bounce the corner of the car — if it keeps bouncing, struts are tired.
  2. Look under the car for cracked rubber bushings or loose sway bar links.
  3. Jack it up safely, grab the wheel, and rock it side to side — clunks here can point to ball joints or tie rods.
  4. Don’t forget to check for loose exhaust heat shields or brackets.

What a Mechanic Will Check

  • Inspect suspension bushings, ball joints, and links.
  • Check struts/shocks for leaks and mount play.
  • Pry bar test on control arms for looseness.
  • Rule out steering components and exhaust rattle.

Ballpark Repair Costs

  • Sway bar links or bushings: $120–$250.
  • Ball joints/control arm work: $300–$700.
  • Struts or shocks: $400–$900+ per pair.
  • Exhaust bracket/heat shield: $50–$150.

When to Call It Quits

Clunks aren’t “just noise.” They’re loose parts, and loose parts can fail. A ball joint that lets go turns a clunk into a crash. If you hear it, get it checked.

Lex-parked-on-level-ground

Visit our DIY Car Maintenance page and level up your car care skills — or keep the quick-reference version below in your glovebox.

Look inside on Amazon.com

Look inside on Amazon.com